Any fear of it popping out on you?
holding good enough for work application?

PS: thanks MrKyoo

I just held it by the clip and grabbed the side of the blackberry to try to pull it out. It wouldn't come out. It seems like the belt clip would break before the phone popped out. I also tried to shake it out. I held it by the belt clip and shook as hard as i could in all directions, and not even the slightest slip from the BB. I'm not saying it is indestructible, but I am saying I cant imagine this thing ever falling out.
What used to make my BB fall out of other clips was accidentally brushing the holster against the door frame as i get in the car. I have don't this a few times with the new Seidio, and the BB stayed put.